Polaris P935 Error Codes - Your Ultimate DIY Troubleshooting Guide

There’s nothing better than kicking back after a long day on the trails or a weekend wrenching on your rig. But coming home to a dirty pool because your robotic cleaner is sitting lifeless at the bottom, blinking a cryptic message? That can kill the vibe fast.

You see that blinking light and think, “Great, another expensive call to the pool guy.” But hold on. Here at FatBoysOffroad, we believe in tackling problems head-on with the right know-how, whether it’s on a 4×4 transfer case or, in this case, your backyard pool cleaner.

We promise this guide will demystify those frustrating flashes. We’re going to break down the most common problems with polaris p935 error codes, give you simple, step-by-step fixes you can do yourself, and share some pro tips to keep your cleaner out of the “shop” and in the water where it belongs. Let’s dive in.

What Are Polaris P935 Error Codes and Why Should You Care?

Think of an error code as your cleaner’s check engine light. It’s not just a random blink; it’s a specific signal telling you exactly where to look. Instead of guessing, you get a direct pointer to the problem.

Understanding these codes is a huge advantage for any DIYer. The primary benefits of polaris p935 error codes are that they save you time, money, and frustration. You can diagnose an issue in minutes instead of hours.

By fixing a small problem yourself—like a jammed impeller or a dirty filter—you avoid a costly service call and prevent minor issues from turning into major, wallet-busting repairs. This is the first step in a solid polaris p935 error codes care guide.

Your Complete Polaris P935 Error Codes Troubleshooting Guide

Alright, let’s get our hands dirty. Before you start any of these checks, the number one rule is SAFETY FIRST. Always disconnect the cleaner’s power supply unit from the wall outlet before you handle the cleaner or its cable. Never work on it while it’s plugged in.

Here’s our breakdown of the most common codes you’ll encounter. We’ll show you how to polaris p935 error codes can be diagnosed and fixed with basic tools and a little patience.

Error 1 (Er01): Cleaner Cannot Climb Walls or Gets Stuck

This is one of the most frequent faults. It means your P935 is struggling to get the traction it needs to scale your pool walls, a key part of its cleaning cycle.

Check the Filter Canister: The most common culprit. A clogged filter restricts water flow, reducing the suction that helps it climb. Open the top, pull out the filter canister, and give it a thorough cleaning with a hose.
Inspect the Brushes: The pleated rubber brushes on the front and back are critical for grip. If they’re worn down, smooth, or damaged, the cleaner can’t grab the pool surface. You can find replacement brushes (Part #R0526100) online or at a pool store.
Verify Water Chemistry: Believe it or not, slick algae growth on your pool walls (even if it’s not visible yet) can prevent the cleaner from climbing. Test your water and make sure your chlorine and pH levels are in the correct range.

Error 2 (Er02) & Error 3 (Er03): Drive Motor Fault (Right or Left)

These codes point to a problem with one of the two drive motors that turn the cleaner’s tracks. Error 2 is for the right-side motor, and Error 3 is for the left.

The first step is to look for a simple obstruction. Turn the cleaner upside down (on a soft surface like grass or a towel to avoid scratching it) and inspect the tracks and wheels.

Look for debris like small pebbles, twigs, or even a kid’s toy wedged in the track system.
Carefully remove any obstruction you find.
Try to turn the wheels on the affected side by hand. If they move freely, the obstruction was likely the issue. If a wheel is seized and won’t budge, the motor itself may have failed.

Replacing a drive motor is a more involved, but definitely doable, DIY job. If you’re comfortable with basic disassembly, it can save you a bundle.

Error 4 (Er04): Fan Motor (Impeller) Fault

This error means the motor that creates suction is jammed or has failed. 9 times out of 10, it’s just something stuck in the impeller.

With the power off, reach into the top intake where the filter sits. You should be able to feel the small fan impeller. Gently try to spin it with your finger. Often, you’ll find hair, string, or leaf stems wrapped around it, preventing it from turning.

Carefully pull out any debris you find. A pair of needle-nose pliers can be a great help here. Once clear, the impeller should spin freely. If it’s clear but still won’t spin, the motor may need replacement.

Error 10 (Er10): Communication Fault

This code indicates a problem between the floating power cable and the cleaner’s main control unit. It’s an electrical connection issue, but often a simple one.

Check the Connection: The most important check is where the cable plugs into the top of the cleaner. Unscrew the locking collar and unplug it. Look for bent or corroded pins. Make sure it’s dry and plug it back in, ensuring the collar is hand-tight.
Inspect the Cable: Walk the entire length of the blue power cable. Look for any cuts, kinks, or chew marks from pets. A damaged cable can cause a communication fault and is a serious safety hazard. If you find damage, the cable must be replaced.
Check the Control Box: Ensure the cable is securely plugged into the control box that you plug into the wall. Sometimes it can get pulled loose.

Proactive Maintenance: Best Practices to Prevent Error Codes

The best way to deal with error codes is to never see them. A little bit of routine care goes a long way. This isn’t just a repair manual; it’s a polaris p935 error codes guide to prevention.

Following these polaris p935 error codes best practices also promotes a more sustainable approach. A well-maintained machine lasts longer, keeping it out of the landfill. This is the core of having a sustainable polaris p935 error codes strategy—fix it, don’t toss it.

Clean the Filter After Every Cycle: We can’t stress this enough. A clean filter is the #1 way to ensure peak performance and prevent climbing issues (Er01). A clean filter also means the motor doesn’t work as hard, which is a more eco-friendly polaris p935 error codes solution because it uses less electricity.
Empty Debris Regularly: Don’t let the cleaner get overloaded with leaves and heavy debris.
Store it Properly: When not in use, take the cleaner out of the pool. Store it out of direct sunlight, preferably on a caddy, to protect the plastic and rubber components from UV damage.
Untangle the Cable: Don’t just coil the cable tightly. Lay it out straight in the sun every few weeks to relax any “memory” kinks, which helps prevent tangling and communication errors.

When to Throw in the Towel and Call a Pro

We’re all for DIY, but it’s just as important to know your limits. You should call a certified pool technician if:

The unit is still under warranty. Don’t void your warranty by opening up the motor housing. Let the manufacturer handle it.
You suspect an internal electrical issue. If you’ve checked all the connections for Er10 and it persists, the fault may be inside the sealed motor unit.
You’ve tried the DIY fixes and the error won’t clear. Sometimes a problem requires specialized diagnostic tools.
You’re simply not comfortable with the repair. There’s no shame in calling for backup.

Frequently Asked Questions About Polaris P935 Error Codes

How do I reset my Polaris P935 after clearing an error?

There’s no complex reset procedure. After you’ve fixed the underlying issue (like cleaning the filter or removing a jam), simply unplug the main control box from the wall outlet, wait about 30 seconds, and plug it back in. This power cycle will clear the code and restart the system.

Can a really dirty pool cause error codes on my P935?

Absolutely. If your pool is full of leaves and large debris after a storm, the cleaner can get overwhelmed. The fan motor can jam (Er04) or the tracks can get clogged (Er02/Er03). It’s always best to do a quick manual scoop of the worst debris before sending in the robot.

Why does my P935 cleaner keep getting the same error code?

If you’re repeatedly getting the same code, it points to a recurring or deeper problem. For a persistent Er01, check for worn-out brushes. For a recurring Er04, you might have a piece of debris that’s hard to see or a failing motor bearing. This is a good time to do a very thorough inspection or consider calling a pro for a deeper look.

Tackling these polaris p935 error codes yourself is empowering. You’ve now got the playbook to diagnose and fix the most common issues, saving you time and money that’s better spent on gear for your next adventure.

Remember to always put safety first, and don’t be afraid to get your hands a little wet. You fix your truck, you can definitely fix your pool cleaner.

Now get that cleaner running, so you can get back to what really matters. Ride safe, and swim clean!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.